--- stack-3.9.1/src/Stack/Setup.hs~	2026-01-04 21:04:25.000000000 +0800
+++ stack-3.9.1/src/Stack/Setup.hs	2026-01-28 02:05:33.123733069 +0800
@@ -2183,6 +2183,8 @@
     Platform Sparc                 Cabal.Linux   -> pure "linux-sparc"
     Platform AArch64               Cabal.OSX     -> pure "macosx-aarch64"
     Platform AArch64               Cabal.FreeBSD -> pure "freebsd-aarch64"
+    Platform PPC64                 Cabal.Linux   -> pure "linux-ppc64"
+    Platform S390X                 Cabal.Linux   -> pure "linux-s390x"
     Platform arch os -> do
       programsDir <- view $ configL . to (.localPrograms)
       prettyThrowM $ UnsupportedSetupCombo os arch tool toolDir programsDir